| 摘要 |
The device has a pair of change over valves (50, 60) arranged in such a manner that a compressor (10), a condenser (20), an expansion valve (40) and an evaporator (30) are respectively coupled with the change over valves at a pair of ends. The change over valves are a four or two way-change over valve and connected in such a manner that the condenser is coupled with the compressor at one end and with the expansion valve at another end when an operating mode is activated. |
